I think the standard procedure is to publish a full page ad in the NY times, and ask for investors to participate in the legal action. IDK, I'm going on memories of past disputes.
In more modern times, a web page might do the trick. Does this "Greek Lawyer" have one?
I'd be willing to join a lawsuit on a per share contingency basis if I could recover 10 cents/share. Otherwise it is hardly worth it for me as I don't have that many shares compared to most of the remaining shareholders.
I'm happy to keep mine for now just to be a thorn under boogaloo's saddle.